title: 15-Meth-oxy-14,15-di-hydro-andranginine.
abstract: The title polycyclic alkaloid, C22H26N2O3, an indole derivative obtained from Melodinus yunnanensis, comprises three chiral C atoms and crystallizes as a racemate. Its seven-membered heterocyclic ring has a twisted conformation, with the N atom within the plane of the indole moiety and with two adjacent C atoms deviating in opposite directions from its plane by 0.756 (3) (methyl-ene C) and -0.802 (3) Å (methine C). In the crystal, pairs of N-H⋯O hydrogen bonds connect the mol-ecules into centrosymmetric dimers.
authors.affiliation: School of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei 230038, People's Republic of China.
authors.forename: Dian-Lei
authors.initials: DL
authors.lastname: Wang
authors.forename: Xiang-Hai
authors.initials: XH
authors.lastname: Cai
authors.forename: Peng
authors.initials: P
authors.lastname: Huang
authors.forename: He-Ping
authors.initials: HP
authors.lastname: Huang